Abstract
A novel current sharing method for a multiphase LLC resonant converter is proposed in this article. Without additional components or control strategies, the proposed method can achieve good current sharing performance even with 10% tolerance of the resonant parameters. Besides, the proposed method is very simple; only the secondary windings of the transformers need to be grouped. This method does not affect the efficiency and load transient characteristics of the LLC resonant converter. The excellent current sharing capability of the proposed method is demonstrated via theoretical analysis under first harmonic approximation assumption and powersim simulation. The experimental results of a 960-W two-phase LLC resonant converter prototype are provided to verify the effectiveness of the proposed method.
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